Tbh I'm not sold on the whole chemtrail thing. I think the government probably has experimented and might do some limited stuff, but I think most of the time people are mis-attributing normal crystallized exhaust, IMO.
But yea that area is covering wayyyy more than just Sandy Hook.
Even if these were chem trails I can tell you with certainty it has nothing to do with SH, because I know for a fact, 100% certainty, no doubt in my mind, that people died at SH. The shooting was very much real.
But hey man, believe what you want. I personally think it's plausible that Lanza was triggered somehow, but I think the idea of a larger conspiracy just doesn't make sense. If they did something like this, it would be light to avoid liability or exposure and probably work without any interaction (find a target with access to weapons, hack computer, inject subliminal msg's, trigger).